What is a DynamoDB stream?
Explore how DynamoDB streams detect inserts, updates, and deletes in tables to trigger events. Learn to activate streams and use AWS Lambda to process these events for real-time database change handling and integration.
We'll cover the following...
An interesting and very common use case that we could have is the need to be able to detect the changes happening in a database. Once these changes are detected, operations can be performed with them.
One approach could be a batch process that would involve querying the database at regular intervals. However, this would be inefficient as it could affect the performance of the database with heavy executions such as a scan. Other than that, this process would also consume RCUs. Finally, the concept of real-time could not be handled in this situation either. Addressing these issues, DynamoDB offers us a better solution, and it is the one we’re going to discuss in this lesson.
What are streams?
Streams are a feature that DynamoDB offers to track the changes that are occuring in a table. When any kind of modification happens in DynamoDB, it will emit an event with information regarding the event that occured. To recall, the three types of changes that we ...